mcdonald



(No Model.)

2 Shee ts.-Sheet 1. P.O.M 0DONALD. STATION INDICATOR.

,28'9. Patented Sept. 18, 1883.

Add 0st F1 ventor';

N, PEYERS. Phnlwliliwgranher. Walhinflon. nc.

(No Model.) I 2 Sheets-Sheet 2.

P. O. MCDONALD.

. STATION INDICATOR. P10285289. Patented Sept. 18, 1883.

I W,- fnvenioz i ZM 65% w 4 fl w d N. PETERS. Phcln-Lithn nphanWashington. D. c.

5 L-Ai 1 5 prov-ement in Street and Station'lndicators for Cars, whichthe 'followiiig 'is full, clear,

These" movable oui'nal-bearin'gs are connected into engagement with theother out of engagement." The on 2 5 is movedbya spring-lever;'f-

Figures 1 and 2 are *opposite end views of the apparatus, "the endsoflthefcase being re i'nove'df Fig; is; a frontview, parts of the frontQrtnewaseeang brekenput, Fig. '45 is a detail view of the'rever'sibledog'or'pawl and its lever,

The caseis made of suitable form, to contain the operating apparatus andto allow a sight to be had of the part of the apronupon' which the nameof the next street or station is printed, (or otherwise marked.)The'top' of the case is shown at A, the bottom at B, ends at G and D,back at E, and front at F.

G and H are the rolls upon which the ends of the apron I are wound.These rollers have fixed bearings for their journals at one end, (see gand it) but at the other end the journals have bearings in an adjustableplate, J, moved by a spring-lever, M, to bring either one of the rollersG H into frictional con tact with the central main drive-roll, O, and tocarry the other out of such contact.

The journal-bearing plate J is supported on studsL, which extend throughslots j in the plate, so as to allow it to be moved upward and downward.This movement is made by f one of the rolls the spring-lever l\I',Iworkingo1'r a fulcrum, in,"

, andhavingone end, m, forked or slotted to embrace a stud, jfup'on thebearing-plate, The upper end of the lever M has a lcn' ob, m",- by whichit is moved, and stud-enga ing in y 'oneof theseries of holes njto holdtl1e"lev'er" T apron is wound'ilbdn whichever of these rolls G or Hisbrought into engagement witlrthe roll" 0,; and unwound from-the otherroll. In the 17 drawings the lower'windingroll'isshown in engagement'withtliedrive-roll; The rolls G and H' are pjr" I "dental turning byspring-brakes I, thatjbe'ar 1 agaiimt their ends. The apron fextends 7'3that'roll and a regulating pressure-r011 Q by whiihithfiplonpressedvagainst the roll 0, and'thus forced to turn therewith, j op f t$16Weri) Th j u als' Or gudgeonsortn 8Q 'r'ollerQ, turn in bearings elonate t-1 dire/c;

tioninline with the journalsof 0;so thatthe 1 roller Q has a limitedmovement to and from the roller 0'. Therol ler Q is drawntOWard'Y theroller'O by springs B, one at each end, which engage on the; gudgeo isbr shafts of the'rollers O and Q.

- It will be seen that to insure the regular speed of movement in theapron it is necessary to actuate it by a roll of unchanging circumfer- 0ence, and thus the winding-rolls cannot be used as drivers, becausetheir circumference i11- ereases as the apron is wound upon them, sothat toward the end of the route traveled by the car the apron wouldmove faster, and it would 5 be impossible to print the names of streetsor places in proper position to come in line with the window f in thefront of the box, because on the return trip the part of the apron thattraveled the fastest in the forward trip would travel the slowest on thereturn. The strength of the spring-lever M is so adjusted that thefrictional bearing of the roller 0 upon G or H (as the case may be) willbe enough to take up all slack of the apron and wind it upon the roller,(G or H,) while at the same time the friction is so light as to allowsaid rollers to slip if they demand more of the apron than the feed anddrive roll' 0; supplies. The relative circumference of thefriction-surfaces of the rollers O and G and H is such that thclatterrollers will always take up all the slack of the apron.

The shaft 0 of the drive-roll O carries a ratchet-wheel, S, with crossribs or teeth 8,

against which engages the tooth of the pawl T.

The pawl or dog T has two teeth, it, one of which is used to drive theroll 0 in one direction and the other in the other. The pawl works on apin, a, of a pawl-lever, U, and has a tooth, i, (see Fig. 4,) engaged bya springtoe, V, to hold either of the teeth '6 in the working position.The toe Vis inserted inasocket in the end of the lever U, containing aspiral spring, v, by which the toe is pressed outward against the tootht at the back of the pawl.

The pawl is adjusted to throw either of the teeth i into the activeposition by a rod, 25 secured to the pawl, and extending through a slotin the lever and a slot in the end 0, and having a thumb-knob, t, bywhich itismoved. The pawl-lever has a slot, u, to receiveastud, '20,which slides in said slot and moves the lever so as to carry the pawlthe full distance from one tooth s to another, so that the wheel S willbe moved the distance of a tooth with each complete movement of thelevcrU. The stud w is upon the crosshead- \V of a pistonrod, \V. Thecross-head works ina guide, X. WV" is the pistonworkinginanair-cylinder,Z, being lifted by pressure of air beneath itand depressed by the action of the spring a, by which the free end ofthe pawl-lever is drawn down after it has been lifted. The lower end ofthe cylinder Z is in communication by means To move the lever U by handa cord, 1), is attached to the same or to the stud w or crosshead NV,and passes upward through a hole in the case.

6 is a roll around which the apron is carried to hold it in a verticalposition just behind the window f, so that the name thereon may beplainly seen. The end 0 of the shaft of the drive-roll 0 extends throughthe end of the case, and is formed to receive a hand-crank, by which itmay be turned when occasion requires. A part, F, of the front F is supported on hinges f, so that it can be opened to give access to theinterior.

The apron may be used as an advertising medium.

I claim 1. The combination of central drive roll, 0, having shaft 0,toothed wheel S, piston \V erosshead WV, cylinder Z, lever U, mounted onshaft 0, and provided with pawl T, at one end engaging with the toothedwheel and at the other end hinged to the cross-head, roll ers G and H,one on each side of the central main drive-roll, and an apron, I, as setforth.

2. The combination of apron I, upper roll, G, lower roll, H,intermediate drive-roll, rib and groove bearing between the drive-rolland upper and lower rolls, and movable journalplate J for adjusting theupper and lower rolls, as set forth.

8. In a street and station register, the driveroll 0 and winding-rolls Gand H, with frictional connection, as described, and the movablejournal-plate J, held in place by a springlever, M, substantially as setforth.

l. In a street and station indicator, the combination of apron I, upperroll, G, lower roll, H, central drive-roll, rib and groove bearingbetween the drive-ro1l and the upper and lower rolls, the regulatingpressureroll Q, and carrying-roll c, as set forth.

5. The combination, with the central driveroll, 0, having shaft 0 andtoothed wheel S, of the lever U, having pawl T pivoted there to,provided with tooth t, spring-toe V in socket in end of lever, andadjusting-rod 1 having handle it, as set forth- FRED C. MCDONALD.

IVitnesses:

SAML. KNIGHT, HANNIBAL LoEvv-

